The invention relates to a hygienic elastic garment for men's underwear, which forms part and is sewn to classic underpants. It has a tear-shaped vertical opening extending from the elastic on the waistband of the underpants up to a given distance above the sewing in the top block depending on the model. By introducing the testicles through said opening, the base of said opening is located between the testicles and the groin. The testicles tend to be separated towards the front due to the fact that the garment is sewn to the inner front part of the underpants, thereby reducing contact and direct friction between the testicles and the groin. Said garment can provide relief for many individuals who suffer itching, eczema, rash. etc. caused by perspiration and friction.